Spark-coil.



A. J. GIPFORD, I. J. BURNS & B. S. T. BISHOP.

- SPARK COIL.

' APPLICATION FILED AUG. 30, 1909.

998,892, Paiinted Jul 25, 1911 UNITED STATES PATENT OFFICE.

ALBERT. morrroao, JAMES J. Bonus, AND BENJAMIN s. T. msnor, or WORCESTER,

mssncnusn'r'rs, ASSIGNORS TO w. H. LELAND & COMPANY, or wonons'rnn, MAS- sncnusn'r'rs, A FIRM.

SPARK-COIL.

Specification of Letters Patent. I Patented J uly 25, 1911, Original application filed November 6, 1908, Serial No. 461,308. Divided and this application filed August 30, 1309. Serial No. 515,133.

To all whom it may concern:'

Be it .known that we, ALBERT J. Grrrono, JAMES J. BURNS, and BENJAMIN S. T. Bisr-ror, citizens of the United States, all residing at Worcester, in the county of \Vorcester and State of Massachusetts, have invented a new and useful Spark-Coil, of which the following is a specification.

This is a division of our Letters-Patent No. 933,246 granted on the seventh day of September, 1909, for an ignition device for gas1 engines and this case relates to a spark coi The principal objectsof the invention are to provide simple and convenient means whereby one of the .sets of terminals of a spark coil can be located along the front wall' of the receptacle therefor between it and its support, as for example, the dash of an automobile, thus-protecting them and removing them as, far as possible from the other terminals and avoiding the danger from shortcircuiting which is always present in cases where the terminals are near each other, and providing a more convenient location for the terminals and for the contacts in the box; and to provide an improved construction of unit with finely adjustable means for regulating the length of spark and holding the same accurately after it is once adjusted, even when the vehicle is subjected to rough usage.

Further objects and advantages of the invention will appear hereinafter.

Reference is to be had to the accompanying drawings, in which,

Figure 1 is a side elevation of a spark coil receptacle in accordance with this invention, parts appearing in section. Fig. 2 is a front view of one end thereof partlybroken away to show interior const-ruction.- Fig. 3 is a plan of part thereof. Fig. 4 is a side elevation of the top portion thereof, and, Fig. 5'

is a sectional View of one of the terminals which is located at the front of the re:- ceptacle. The invention is shown as applied to box or receptacle having oneseries of terminals 25 on the front'between the box and the dash board 20 of an automobile or other support therefor. This is shown in this instance as being accomplished by providing the rear wall with a perforation countersunk on both sides and locating a series of cealed from view thereby, the wires passing down at the front of the box. This location of these terminals is a matter of considerable importance, as it removes them as far as possible from the high tension -terminals 28, and thus reduces the chance of short-circuiting either by the crossing of the wires or by accidentally getting any piece of metal between the terminals.

I It also removes one setof terminals from a part of the receptaolewhich is visible, and puts them in a position where neither they nor the wires can be injured by any ordinary accident.

Any terminals can be used in this place, but

- it is referred to add'a binding screw 29 to the p ug 27, and place a spring-pressed plunger 30in the plug so asto project inwardly.

The receptacle is shownas provided with unit coils 31 which may be of ordinary construction. Each unit coil is shown as being held in position by'a spring 33 and as'being provided with the necessary contact piece 34 for making the electrical connection with the plunger 30. The vibrator of the unit coil is also improved for the purpose of securing a. finer adjustment and accurately holding the parts in position. For this purpose a stationary member or'frame 35is mounted on the top of the unit coil and provided with a horizontal pivot 36. On the latter is swingingly mounted a rigid member 38 normally held up by a spring 39 and adapted to be adjusted downwardly by a screw 40 having a knurled head ll providedwith. a

circumferential series of downwardly pro jecting teeth 42 of fine pitch. On top of the member 38 is a pointed projection 43 adapt ed to engage the teeth from below, so that the screw can be adjusted readily, and yet the resistance of the projection 43 due to the spring 39 will be sufficient to'avoid any necessity of-using excessive care in turning the screw and to hold the screw securely when it has-been adjusted. In this way the screw can be turned 'inlsuch a way as to sevention, we are aware that many m0difications can be made therein by any person skilled'in the art without departing from the scope of the invention expressed in the claims. Therefore, we do not wish to be limited to all the details of construction shown, but- Whatwe do claim is 1. In a device of the character described, the combination of a support, a hollow plug secured thereto and projecting therefrom on one side, a plunger extending from said plug through the support and projecting from the opposite side thereof, a spring in the plug for normally forcing the plunger toward said opposite side, and a binding nut on the projecting portion of the plug.

2. As an article of manufacture, a'receptacle for spark coils and the like, having a bushing set into its wall, a flanged plug set into the other sideof said wall and screwing into said bushing, a binding nut or screw on the plug, and a spring-pressed plunger extending through the bushing.

3. As an article of manufacture, a receptacle for spark coils and thelike, having a perforation in its'wall countersunk on both sides, a bushingsetinto one countersink, a flanged plug set into the other countersink and screwing'into said bushing, whereby the bushing and plug are held firmly against the wall, a binding nut or screw on the plug, and a spring-pressed plunger extending through the bushing.

4. In a spark coil, the combination of a rigid member mounted to swing on a horizontal pivot, resilient means for moving said pivoted member in one direction, a screw mounted independently of said rigid member for moving it in the other direction, said screw having a surface provided with teeth thereon, projecting toward the rigid member and said pivoted member having a rigid projection adapted to engage said teeth, whereby the position of the screw can be adjusted to a fine adjustment, and a spring contact member extending from the pivoted member.

5. In a spark coil, the combination of a support, ahorizontal pivot thereon, a rigid member mounted on said pivot and extending therefrom, a spring for forcing said rigid member upwardly, screw carried by said support and passing freely through said member and through the spring for forcing it downwardly, said. screw having a head provided on the bottom thereof with a circumferential series of downwardly projecting teeth, a fixed pointed projection on the other end of the un er surface of the pivoted member for engaging said teeth,

whereby the turning of the screw'to adjust the position of the pivoted member can be regulated Within fine limits, a resilient vibrator projecting from. said pivoted member past the opposite side of said pivot, and means for regulating the vibrations thereof.

6. The combination with a spark coil rcceptacle, a support therefor at the front thereof and an electricalterminal mounted between the top and bottom of the vertical front wall of the receptacle between the receptacle and support and having a yielding contact member inside said wall extending horizontally therethrough, and having a binding screw on the outside, of a coil unit adapted to be held vertically in the receptacle, having a contact piece on a vertical face thereof for engaging said contact member.

In testimony whereof we have hereunto set our hands, in the presence of two subscribing witnesses.

ALBERT J. GIFFORD. JAllii'ES J. BURNS. BENJ. 'l. BEST-[OR Witnesses CnAnLns ll. Snninv, CARL M. BLUE. 

